64061971 has 2 divisors, whose sum is σ = 64061972. Its totient is φ = 64061970.

The previous prime is 64061947. The next prime is 64061981. The reversal of 64061971 is 17916046.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64061971 is a prime.

It is a super-2 number, since 2×64061971² = 8207872256809682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64061941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32030985 + 32030986.

It is an arithmetic number, because the mean of its divisors is an integer number (32030986).

Almost surely, 2^64061971 is an apocalyptic number.

64061971 is a deficient number, since it is larger than the sum of its proper divisors (1).

64061971 is an equidigital number, since it uses as much as digits as its factorization.

64061971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 64061971 is about 8003.8722503548. The cubic root of 64061971 is about 400.1290646013.

The spelling of 64061971 in words is "sixty-four million, sixty-one thousand, nine hundred seventy-one".